sjero.net Git - linphone/blob - coreapi/ec-calibrator.c

   1 /*
   2 linphone
   3 Copyright (C) 2011 Belledonne Communications SARL
   4 Author: Simon MORLAT (simon.morlat@linphone.org)
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19 */
  20
  21 #include "private.h"
  22
  23 #include "mediastreamer2/mstonedetector.h"
  24 #include "mediastreamer2/dtmfgen.h"
  25
  26
  27
  28
  29
  30 static void ecc_init_filters(EcCalibrator *ecc){
  31         ecc->ticker=ms_ticker_new();
  32
  33         ecc->sndread=ms_snd_card_create_reader(ecc->play_card);
  34         ecc->det=ms_filter_new(MS_TONE_DETECTOR_ID);
  35         ecc->rec=ms_filter_new(MS_FILE_REC_ID);
  36
  37         ms_filter_link(ecc->sndread,0,ecc->det,0);
  38         ms_filter_link(ecc->det,0,ecc->rec,0);
  39
  40         ecc->play=ms_filter_new(MS_FILE_PLAYER_ID);
  41         ecc->gen=ms_filter_new(MS_DTMF_GEN_ID);
  42         ecc->sndwrite=ms_snd_card_create_writer(ecc->capt_card);
  43
  44         ms_filter_link(ecc->play,0,ecc->gen,0);
  45         ms_filter_link(ecc->gen,0,ecc->sndwrite,0);
  46
  47         ms_ticker_attach(ecc->ticker,ecc->play);
  48         ms_ticker_attach(ecc->ticker,ecc->sndread);
  49 }
  50
  51 static void ecc_deinit_filters(EcCalibrator *ecc){
  52         ms_ticker_detach(ecc->ticker,ecc->play);
  53         ms_ticker_detach(ecc->ticker,ecc->sndread);
  54
  55         ms_filter_unlink(ecc->play,0,ecc->gen,0);
  56         ms_filter_unlink(ecc->gen,0,ecc->sndwrite,0);
  57
  58         ms_filter_unlink(ecc->sndread,0,ecc->det,0);
  59         ms_filter_unlink(ecc->det,0,ecc->rec,0);
  60
  61         ms_filter_destroy(ecc->sndread);
  62         ms_filter_destroy(ecc->det);
  63         ms_filter_destroy(ecc->rec);
  64         ms_filter_destroy(ecc->play);
  65         ms_filter_destroy(ecc->gen);
  66         ms_filter_destroy(ecc->sndwrite);
  67
  68         ms_ticker_destroy(ecc->ticker);
  69 }
  70
  71 static void on_tone_sent(void *data, MSFilter *f, unsigned int event_id, void *arg){
  72         MSDtmfGenEvent *ev=(MSDtmfGenEvent*)arg;
  73         EcCalibrator *ecc=(EcCalibrator*)data;
  74         ecc->sent_count++;
  75         ecc->acc-=ev->tone_start_time;
  76         ms_message("Sent tone at %u",(unsigned int)ev->tone_start_time);
  77 }
  78
  79 static void on_tone_received(void *data, MSFilter *f, unsigned int event_id, void *arg){
  80         MSToneDetectorEvent *ev=(MSToneDetectorEvent*)arg;
  81         EcCalibrator *ecc=(EcCalibrator*)data;
  82         ecc->recv_count++;
  83         ecc->acc+=ev->tone_start_time;
  84         ms_message("Received tone at %u",(unsigned int)ev->tone_start_time);
  85 }
  86
  87 static void ecc_play_tones(EcCalibrator *ecc){
  88         MSDtmfGenCustomTone tone;
  89         MSToneDetectorDef expected_tone;
  90
  91
  92         ms_filter_set_notify_callback(ecc->det,on_tone_received,ecc);
  93
  94         expected_tone.frequency=2000;
  95         expected_tone.min_duration=40;
  96         expected_tone.min_amplitude=0.02;
  97
  98         ms_filter_call_method (ecc->det,MS_TONE_DETECTOR_ADD_SCAN,&expected_tone);
  99
 100         tone.frequency=1000;
 101         tone.duration=1000;
 102         tone.amplitude=1.0;
 103
 104         /*play an initial tone to startup the audio playback/capture*/
 105         ms_filter_call_method(ecc->gen,MS_DTMF_GEN_PLAY_CUSTOM,&tone);
 106         sleep(2);
 107
 108         ms_filter_set_notify_callback(ecc->gen,on_tone_sent,ecc);
 109         tone.frequency=2000;
 110         tone.duration=100;
 111
 112         ms_filter_call_method(ecc->gen,MS_DTMF_GEN_PLAY_CUSTOM,&tone);
 113         sleep(1);
 114         ms_filter_call_method(ecc->gen,MS_DTMF_GEN_PLAY_CUSTOM,&tone);
 115         sleep(1);
 116         ms_filter_call_method(ecc->gen,MS_DTMF_GEN_PLAY_CUSTOM,&tone);
 117         sleep(1);
 118
 119         if (ecc->sent_count==3 && ecc->recv_count==3){
 120                 int delay=ecc->acc/3;
 121                 if (delay<0){
 122                         ms_error("Quite surprising calibration result, delay=%i",delay);
 123                         ecc->status=LinphoneEcCalibratorFailed;
 124                 }else{ms_message("Echo calibration estimated delay to be %i ms",delay);
 125                         ecc->delay=delay;
 126                         ecc->status=LinphoneEcCalibratorDone;
 127                 }
 128         }else{
 129                 ms_error("Echo calibration failed, tones received = %i",ecc->recv_count);
 130                 ecc->status=LinphoneEcCalibratorFailed;
 131         }
 132
 133 }
 134
 135 static void  * ecc_thread(void *p){
 136         EcCalibrator *ecc=(EcCalibrator*)p;
 137
 138         ecc_init_filters(ecc);
 139         ecc_play_tones(ecc);
 140         ecc_deinit_filters(ecc);
 141         return NULL;
 142 }
 143
 144 EcCalibrator * ec_calibrator_new(MSSndCard *play_card, MSSndCard *capt_card, LinphoneEcCalibrationCallback cb, void *cb_data ){
 145         EcCalibrator *ecc=ms_new0(EcCalibrator,1);
 146
 147         ecc->cb=cb;
 148         ecc->cb_data=cb_data;
 149         ecc->capt_card=capt_card;
 150         ecc->play_card=play_card;
 151         ms_thread_create(&ecc->thread,NULL,ecc_thread,ecc);
 152         return ecc;
 153 }
 154
 155 LinphoneEcCalibratorStatus ec_calibrator_get_status(EcCalibrator *ecc){
 156         return ecc->status;
 157 }
 158
 159 void ec_calibrator_destroy(EcCalibrator *ecc){
 160         ms_thread_join(ecc->thread,NULL);
 161         ms_free(ecc);
 162 }
 163
 164 int linphone_core_start_echo_calibration(LinphoneCore *lc, LinphoneEcCalibrationCallback cb, void *cb_data){
 165         if (lc->ecc!=NULL){
 166                 ms_error("Echo calibration is still on going !");
 167                 return -1;
 168         }
 169         lc->ecc=ec_calibrator_new(lc->sound_conf.play_sndcard,lc->sound_conf.capt_sndcard,cb,cb_data);
 170         return 0;
 171 }